Answer: Jump-to-default risk, as measured by 99.9% VaR, because a default could cause a significant loss for the bank.

## Explanation The Incremental Risk Charge (IRC) is specifically designed to capture **jump-to-default risk** in credit portfolios. Here's why: - **IRC Purpose**: The IRC was introduced under Basel 2.5 to address the limitations of traditional VaR models in capturing credit migration and default risk, particularly for instruments like credit derivatives and securitized products. - **Jump-to-Default Risk**: This refers to the risk that a counterparty or issuer might suddenly default, causing significant losses. The IRC specifically measures this risk using a 99.9% VaR over a one-year time horizon. - **Why Other Options Are Incorrect**: - **Option A**: Expected shortfall risk is not the primary focus of IRC, though IRC does use a VaR-based approach. - **Option C**: Equity price risk is captured by market risk capital charges, not specifically by IRC. - **Option D**: Interest rate risk is addressed by other regulatory capital frameworks, not the IRC. - **Regulatory Context**: The IRC was developed to ensure banks hold sufficient capital against the risk of credit deterioration and default in their trading books, complementing the standard market risk capital requirements. Therefore, **Option B** correctly identifies jump-to-default risk as the specific risk recognized by the incremental risk charge.

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